Both were traveling at high speed.

两辆（火车）都在高速行驶。

youdao

The trains were traveling at full speed.

当时两列火车都在全速行驶。

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The train was traveling at an ordinary speed.

火车在以普通速度行驶。

youdao

We were traveling at a speed of 30 miles an hour.

我们以每小时30英里的速度前进。

youdao

We were traveling at a speed of 30 miles an hour.

我们以每小时30英里的速度前进。

youdao